Fine mapping of a gene for low-tiller number, Ltn, in japonica rice (Oryza sativa L.) variety Aikawa 1

Fujita Daisuke, Ebron Leodegario A., Araki Etsuko, Kato Hiroshi, Khush Gurdev S., Sheehy John E., Lafarge Tanguy, Fukuta Yoshimichi, Kobayashi Nobuya. 2010. Fine mapping of a gene for low-tiller number, Ltn, in japonica rice (Oryza sativa L.) variety Aikawa 1. Theoretical and Applied Genetics, 120 (6) : pp. 1233-1240.

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Quartile : Q1, Sujet : AGRONOMY / Quartile : Q1, Sujet : HORTICULTURE / Quartile : Q1, Sujet : PLANT SCIENCES / Quartile : Q2, Sujet : GENETICS & HEREDITY

Abstract : Tillering is one of the most important agronomic traits related to grain production in rice (Oryza sativa L.). A japonica-type variety, Aikawa 1, is known to have low-tiller number. The detailed location of a lowtillering gene, Ltn, which has been localized on chromosome 8 in Aikawa 1, was conWrmed by molecular mapping. Using BC5F2 individuals derived from a cross between IR64 and Aikawa 1, the low-tillering gene was mapped to an interval deWned by SSR markers ssr5816-3 and A4765. This was designated as Ltn because there was no reported gene for tillering in the region of chromosome 8. Through high-resolution linkage analysis, the candidate region of Ltn was located between DNA markers ssr6049-23 and ind6049-1 corresponding to 38.6 kbp on the Nipponbare genome sequence. These DNA markers, which were tightly linked to Ltn, are useful for marker-assisted selection in breeding studies. (Résumé d'auteur)

Mots-clés Agrovoc : Oryza sativa, Tallage, Amélioration des plantes, Phénotype, Génotype, Gène, Identification, Marqueur génétique, PCR

Mots-clés géographiques Agrovoc : France, Philippines, Japon

Mots-clés complémentaires : Oryza sativa japonica, Oryza sativa indica

Classification Agris : F30 - Plant genetics and breeding
U30 - Research methods

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

  • Fujita Daisuke, IRRI (PHL)
  • Ebron Leodegario A., IRRI (PHL)
  • Araki Etsuko, National Agricultural Research Centre (JPN)
  • Kato Hiroshi, National Institute of Crop Science (JPN)
  • Khush Gurdev S., IRRI (PHL)
  • Sheehy John E., IRRI (PHL)
  • Lafarge Tanguy, CIRAD-BIOS-UPR AIVA (PHL)
  • Fukuta Yoshimichi, JIRCAS (JPN)
  • Kobayashi Nobuya, IRRI (PHL)

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